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Multi-Spring O Ring Mechanical Seals N71 for Chesterton Mechanical Seal Type C891/AES SAI

mechanical o rings
O Ring Mechanical Seals N71
Replacement for:
  • Chesterton mechanical seal type C891 
  • Chesterton mechanical seal type AES SAI
Features:
  • Multi-Spring
  • Square pin design
  • Easy installation

Performance Capabilities of O Ring Mechanical Seals N71

  • Temperature: -20℃ to 180℃, depend on o-ring material
  • Pressure: Up to 16 bar
  • Speed: Up to 15 m/s
  • End play/axial float allowance ±1mm

Sizes of O Ring Mechanical Seals N71

16mm to 200mm
0.75” to 8”

Materials Combination of O Ring Mechanical Seals N71

  • Face: Carbon, SiC, TC
  • Seat: Ceramic, SiC, TC
  • O-rings: NBR, EPDM, VITON, Aflas, FEP, Kalrez, Chemraz etc.
  • Spring: SS304, SS316, Hastelloy C
  • Metal parts: SS304, SS316

Specification of O Ring Mechanical Seals N71

O Ring Mechanical Seals by Size d D L2
N71-16 16 30.45 35
N71-18 18 32.28 35.2
N71-20 20 34.29 35.2
N71-22 22 36.3 35.2
N71-24 24 38.3 35.2
N71-25 25 39.29 35.2
N71-28 28 42.29 35.2
N71-30 30 44.3 35.2
N71-32 32 46.3 44.65
N71-33 33 47.9 44.65
N71-35 35 49.48 44.65
N71-38 38 54.28 44.65
N71-40 40 56.08 44.65
N71-43 43 59.08 44.65
N71-45 45 61.09 44.65
N71-48 48 64.11 44.65
N71-50 50 66.09 44.65
N71-55 55 71.07 44.65
N71-60 60 77.14 44.65
N71-65 65 83.01 44.65
N71-70 70 86.08 44.65
N71-75 75 98.43 51
N71-80 80 104.76 51
N71-85 85 107.95 51
N71-90 90 114.3 51
N71-95 95 117.48 51
N71-100 100 123.83 51
N71-110 110 133.35 51
N71-120 120 152.4 92.1
N71-125 125 158.75 92.1
N71-130 130 165.1 92.1
N71-135 135 171.45 92.1
N71-140 140 171.45 92.1
N71-145 145 177.8 92.1
N71-150 150 184.15 92.1
N71-155 155 190.5 92.1
N71-160 160 196.85 92.1
N71-165 165 196.85 92.1
N71-170 170 203.2 92.1
N71-175 175 209.55 92.1
N71-180 180 215.9 92.1
N71-185 185 215.9 92.1
N71-190 190 222.25 92.1
N71-195 195 228.6 92.1
N71-200 200 234.95 92.1

O Ring Mechanical Seals by Size d D L2
N71-1" 25.4 39.95 35.2
N71-1 1/8" 28.58 43.13 35.2
N71-1 1/4" 31.75 46.3 44.65
N71-1 3/8" 34.93 49.48 44.65
N71-1 1/2" 38.1 54.43 44.65
N71-1 5/8" 41.28 57.61 44.65
N71-1 3/4" 44.45 60.78 44.65
N71-1 7/8" 47.63 63.96 44.65
N71-2" 50.8 67.13 44.65
N71-2 1/8" 53.98 70.31 44.65
N71-2 1/4" 57.15 73.48 44.65
N71-2 3/8" 60.33 76.66 44.65
N71-2 1/2" 63.5 79.83 44.65
N71-2 5/8" 66.68 83.01 44.65
N71-2 3/4" 66.85 92.08 51
N71-2 7/8" 73.03 95.25 51
N71-3" 76.2 98.43 51
N71-3 1/8" 79.38 101.6 51
N71-3 1/4" 82.55 104.78 51
N71-3 3/8" 85.73 107.95 51
N71-3 1/2" 88.9 111.13 51
N71-3 5/8" 92.08 114.3 51
N71-3 3/4" 95.25 117.48 51
N71-3 7/8" 98.43 120.65 51
N71-4" 101.6 123.83 51
N71-4 1/8" 104.78 127 51
N71-4 1/4" 107.95 130.18 51
N71-4 3/8" 111.13 133.35 51
N71-4 1/2" 114.3 136.53 51
N71-4 3/4" 120.65 152.4 92.1
N71-5" 127 158.75 92.1
N71-5 1/4" 133.35 165.1 92.1
N71-5 1/2" 139.7 171.45 92.1
N71-5 3/4" 146.05 177.8 92.1
N71-6" 152.4 184.15 92.1
N71-6 1/4" 158.75 190.5 92.1
N71-6 1/2" 165.1 196.85 92.1
N71-6 3/4" 171.45 203.2 92.1
N71-7" 177.8 209.55 92.1
N71-7 1/4" 184.15 215.9 92.1
N71-7 1/2" 190.5 222.25 92.1
N71-7 3/4" 196.85 228.6 92.1
N71-8" 203.2 234.95 92.1


Design Drawing of O Ring Mechanical Seals N71

O Ring Mechanical Seals N71
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